UUID Generator: Random v4 UUIDs and GUIDs

Create random version-4 UUIDs (also called GUIDs) from your browser’s secure random generator, one or thousands at a time, in the format you need.

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How to generate UUIDs

1. Choose how many.
2. Pick UPPERCASE, hyphens or braces.
3. Copy or download them.

Questions

Can two UUIDs ever be the same?

In practice no: there are 2¹²² possible v4 UUIDs.

Is my data private?

Yes. Everything happens inside your own browser: nothing you type or choose is uploaded to us or anyone else.

Is it free?

Completely free, with no sign-up, no watermark and no limit on how many times you use it. Light ads keep the site running.